Image Resizer

Change the dimensions of a photo precisely. Type a width and height with the aspect ratio locked, scale by a percentage, or pick a preset such as an Instagram post or YouTube thumbnail. When the new shape differs from the original you choose whether to letterbox, crop to fill or stretch, and large reductions use step-down resampling for sharper results.

How to use the Image Resizer

1. Drop an image to see its original size.
2. Enter a width or height (the other side follows when the lock is on), use a percentage, or pick a preset.
3. If the aspect ratio changes, choose Contain, Cover or Stretch and a padding colour.
4. Pick an output format and quality, then press Resize image.
5. Preview the result and download it.

Features

• Resize by pixels with aspect-ratio lock or by percentage (1–400%)
• Presets for Instagram, Stories, Facebook, X, YouTube and LinkedIn
• Contain with colour or transparent padding, centre-crop cover, or stretch
• High-quality step-down downscaling
• Output as the original format, JPEG, PNG or WebP

Benefits

• Prepare images that match platform requirements exactly
• Avoid distorted photos when changing the shape
• Works offline in your browser with no uploads

Frequently asked questions

What is the difference between contain and cover?

Contain fits the whole image inside the new size and fills the gaps with padding. Cover fills the whole size and trims the edges that do not fit, keeping the centre.

Can I make an image larger?

Yes, up to 400% or any pixel size within browser limits, but enlarging cannot add detail, so the result will look softer.

Is there a maximum size?

Browsers limit canvases to about 16.7 megapixels and 16,384 pixels per side. The tool tells you if a size is too large.

Related tools

• Image Compressor — Shrink JPEG, PNG and WebP images in your browser with a quality slider, optional max size and a before/after size comparison.
• Image Cropper — Crop images with a touch-friendly crop box, aspect presets, keyboard nudging, rotate, flip and exact pixel coordinates.
• Image Converter — Convert images between PNG, JPEG and WebP in your browser, read GIF and BMP files, and set quality and background colour.
• JPG to PNG Converter — Convert JPG and JPEG photos to lossless PNG files in your browser, one at a time or in batches, with previews and sizes.
• PNG to JPG Converter — Convert PNG images to smaller JPG files with adjustable quality and a background colour for transparent areas.
• WebP Converter — Convert JPG, PNG, GIF and BMP to WebP, or convert WebP back to PNG or JPG, with quality control and transparency options.